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Get Faces Associated with Feature Example (VBA)

In SolidWorks, a face is the result of evaluating a feature. A face can be owned by several features.

IFeature::GetFaces returns all faces owned by a feature. This is different from faces highlighted in the user interface when a feature is selected, because the user interface filters out multiple feature faces. This filter is for display purposes only.

An application must use IFace::GetFeature to filter out multiple feature faces. This method returns only the oldest feature from face; that is, the first owning feature in the FeatureManager design tree.
 

This example shows how to eliminate multiple feature faces.

'-----------------------------------------------
' Preconditions:
' 1. Open a part document.
' 2. Select a feature in the FeatureManager design
'    tree.
' 3. Open the Immediate window.
' 4. Run the macro.
'
' Postconditions:
' 1. Prints the name of the feature and number
'    of faces to the Immediate window. Examine
'    the Immediate window.
' 2. Colors the faces of the feature blue. The
'    faces are the same faces as if the you selected
'    the feature via the user interface.
'-----------------------------------------------
Option Explicit
Sub main()
    Dim swApp                   As SldWorks.SldWorks
    Dim swModel                 As SldWorks.ModelDoc2
    Dim swSelMgr                As SldWorks.SelectionMgr
    Dim swSelData               As SldWorks.SelectData
    Dim swFeat                  As SldWorks.Feature
    Dim swFaceFeat              As SldWorks.Feature
    Dim faceArr                 As Variant
    Dim oneFace                 As Variant
    Dim featColors              As Variant
    Dim swFace                  As SldWorks.Face2
    Dim swEnt                   As SldWorks.Entity
    Dim status                  As Boolean
    Set swApp = Application.SldWorks
    Set swModel = swApp.ActiveDoc
    Set swSelMgr = swModel.SelectionManager
    Set swFeat = swSelMgr.GetSelectedObject6(1, -1)
    Set swSelData = swSelMgr.CreateSelectData
    Debug.Print "Feature = " + swFeat.Name + " [" + swFeat.GetTypeName + "]"
    Debug.Print "  Face count = " & swFeat.GetFaceCount
    swModel.ClearSelection2 True
    featColors = swModel.MaterialPropertyValues
    featColors(0) = 0  'R
    featColors(1) = 0  'G
    featColors(2) = 1  'B
    faceArr = swFeat.GetFaces: If IsEmpty(faceArr) Then Exit Sub
    For Each oneFace In faceArr
        Set swFace = oneFace
        Set swEnt = swFace
        Set swFaceFeat = swFace.GetFeature
        ' Check to see if face is owned by multiple features
        If swFaceFeat Is swFeat Then
            status = swEnt.Select4(True, swSelData): Debug.Assert status
            swFace.MaterialPropertyValues = featColors
        Else
            Debug.Print "  Other feature = " & swFaceFeat.Name + " [" + swFaceFeat.GetTypeName + "]"
        End If
    Next
    
End Sub


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